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jwbri
31.12.2019 •
Mathematics
You want to know if high-school females score differently than high-school males on a standardized test. you take a random sample of 28 males and 27 females from high schools across the country and record their scores. which confidence interval would you use to analyze these data?
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Ответ:
Step-by-step explanation:
Random sample size of males, n₁ = 28
Random sample size of males, n₂ = 27
Here,
If n₁ < 30 & n₂ < 30,
we use t-distribution
Therefore,
The confidence interval chosen will be
⇒![\bar{x_{1}} - \bar{x_{2}} \pm t*\sqrt{s(\frac{1}{n_{1}} + \frac{1}{n_{2}})}](/tpl/images/0438/0348/e9f2e.png)
Here,
and,
s is the standard deviation
the value of 't' can be obtained from the standard t- distribution table
Ответ:
Reason 4: Vertical Angles
Step-by-step explanation:
Vertical angles (aka Vertically opposite angles are angles that are opposite each other, separated by a straight "cross" line)
This is a question on geometry + angle properties / congruence and similarity. If you wish to venture further into it/understand this topic better, you may want to follow my Instagram account (learntionary), where I post some of my own notes on certain topics and also some tips that may be useful to you :)